fs/proc/proc_misc.c

   1 /*
   2  *  linux/fs/proc/proc_misc.c
   3  *
   4  *  linux/fs/proc/array.c
   5  *  Copyright (C) 1992  by Linus Torvalds
   6  *  based on ideas by Darren Senn
   7  *
   8  *  This used to be the part of array.c. See the rest of history and credits
   9  *  there. I took this into a separate file and switched the thing to generic
  10  *  proc_file_inode_operations, leaving in array.c only per-process stuff.
  11  *  Inumbers allocation made dynamic (via create_proc_entry()).  AV, May 1999.
  12  *
  13  * Changes:
  14  * Fulton Green      :  Encapsulated position metric calculations.
  15  *                      <kernel@FultonGreen.com>
  16  */
  17
  18 #include <linux/types.h>
  19 #include <linux/errno.h>
  20 #include <linux/time.h>
  21 #include <linux/kernel.h>
  22 #include <linux/kernel_stat.h>
  23 #include <linux/tty.h>
  24 #include <linux/string.h>
  25 #include <linux/mman.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/ioport.h>
  28 #include <linux/config.h>
  29 #include <linux/mm.h>
  30 #include <linux/mmzone.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/swap.h>
  33 #include <linux/slab.h>
  34 #include <linux/smp.h>
  35 #include <linux/signal.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/seq_file.h>
  40 #include <linux/times.h>
  41 #include <linux/profile.h>
  42 #include <linux/blkdev.h>
  43 #include <linux/hugetlb.h>
  44 #include <linux/jiffies.h>
  45 #include <linux/sysrq.h>
  46 #include <linux/vmalloc.h>
  47 #include <asm/uaccess.h>
  48 #include <asm/pgtable.h>
  49 #include <asm/io.h>
  50 #include <asm/pgalloc.h>
  51 #include <asm/tlb.h>
  52 #include <asm/div64.h>
  53
  54 #define LOAD_INT(x) ((x) >> FSHIFT)
  55 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  56 /*
  57  * Warning: stuff below (imported functions) assumes that its output will fit
  58  * into one page. For some of those functions it may be wrong. Moreover, we
  59  * have a way to deal with that gracefully. Right now I used straightforward
  60  * wrappers, but this needs further analysis wrt potential overflows.
  61  */
  62 extern int get_hardware_list(char *);
  63 extern int get_stram_list(char *);
  64 extern int get_chrdev_list(char *);
  65 extern int get_blkdev_list(char *);
  66 extern int get_filesystem_list(char *);
  67 extern int get_exec_domain_list(char *);
  68 extern int get_dma_list(char *);
  69 extern int get_locks_status (char *, char **, off_t, int);
  70 #ifdef CONFIG_SGI_DS1286
  71 extern int get_ds1286_status(char *);
  72 #endif
  73
  74 static int proc_calc_metrics(char *page, char **start, off_t off,
  75                                  int count, int *eof, int len)
  76 {
  77         if (len <= off+count) *eof = 1;
  78         *start = page + off;
  79         len -= off;
  80         if (len>count) len = count;
  81         if (len<0) len = 0;
  82         return len;
  83 }
  84
  85 static int loadavg_read_proc(char *page, char **start, off_t off,
  86                                  int count, int *eof, void *data)
  87 {
  88         int a, b, c;
  89         int len;
  90
  91         a = avenrun[0] + (FIXED_1/200);
  92         b = avenrun[1] + (FIXED_1/200);
  93         c = avenrun[2] + (FIXED_1/200);
  94         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
  95                 LOAD_INT(a), LOAD_FRAC(a),
  96                 LOAD_INT(b), LOAD_FRAC(b),
  97                 LOAD_INT(c), LOAD_FRAC(c),
  98                 nr_running(), nr_threads, last_pid);
  99         return proc_calc_metrics(page, start, off, count, eof, len);
 100 }
 101
 102 struct vmalloc_info {
 103         unsigned long used;
 104         unsigned long largest_chunk;
 105 };
 106
 107 static struct vmalloc_info get_vmalloc_info(void)
 108 {
 109         unsigned long prev_end = VMALLOC_START;
 110         struct vm_struct* vma;
 111         struct vmalloc_info vmi;
 112         vmi.used = 0;
 113
 114         read_lock(&vmlist_lock);
 115
 116         if(!vmlist)
 117                 vmi.largest_chunk = (VMALLOC_END-VMALLOC_START);
 118         else
 119                 vmi.largest_chunk = 0;
 120
 121         for (vma = vmlist; vma; vma = vma->next) {
 122                 unsigned long free_area_size =
 123                         (unsigned long)vma->addr - prev_end;
 124                 vmi.used += vma->size;
 125                 if (vmi.largest_chunk < free_area_size )
 126
 127                         vmi.largest_chunk = free_area_size;
 128                 prev_end = vma->size + (unsigned long)vma->addr;
 129         }
 130         if(VMALLOC_END-prev_end > vmi.largest_chunk)
 131                 vmi.largest_chunk = VMALLOC_END-prev_end;
 132
 133         read_unlock(&vmlist_lock);
 134         return vmi;
 135 }
 136
 137 static int uptime_read_proc(char *page, char **start, off_t off,
 138                                  int count, int *eof, void *data)
 139 {
 140         struct timespec uptime;
 141         struct timespec idle;
 142         int len;
 143         u64 idle_jiffies = init_task.utime + init_task.stime;
 144
 145         do_posix_clock_monotonic_gettime(&uptime);
 146         jiffies_to_timespec(idle_jiffies, &idle);
 147         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 148                         (unsigned long) uptime.tv_sec,
 149                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 150                         (unsigned long) idle.tv_sec,
 151                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 152
 153         return proc_calc_metrics(page, start, off, count, eof, len);
 154 }
 155
 156 static int meminfo_read_proc(char *page, char **start, off_t off,
 157                                  int count, int *eof, void *data)
 158 {
 159         struct sysinfo i;
 160         int len, committed;
 161         struct page_state ps;
 162         unsigned long inactive;
 163         unsigned long active;
 164         unsigned long free;
 165         unsigned long vmtot;
 166         struct vmalloc_info vmi;
 167
 168         get_page_state(&ps);
 169         get_zone_counts(&active, &inactive, &free);
 170
 171 /*
 172  * display in kilobytes.
 173  */
 174 #define K(x) ((x) << (PAGE_SHIFT - 10))
 175         si_meminfo(&i);
 176         si_swapinfo(&i);
 177         committed = atomic_read(&vm_committed_space);
 178
 179         vmtot = (VMALLOC_END-VMALLOC_START)>>10;
 180         vmi = get_vmalloc_info();
 181         vmi.used >>= 10;
 182         vmi.largest_chunk >>= 10;
 183
 184         /*
 185          * Tagged format, for easy grepping and expansion.
 186          */
 187         len = sprintf(page,
 188                 "MemTotal:     %8lu kB\n"
 189                 "MemFree:      %8lu kB\n"
 190                 "Buffers:      %8lu kB\n"
 191                 "Cached:       %8lu kB\n"
 192                 "SwapCached:   %8lu kB\n"
 193                 "Active:       %8lu kB\n"
 194                 "Inactive:     %8lu kB\n"
 195                 "HighTotal:    %8lu kB\n"
 196                 "HighFree:     %8lu kB\n"
 197                 "LowTotal:     %8lu kB\n"
 198                 "LowFree:      %8lu kB\n"
 199                 "SwapTotal:    %8lu kB\n"
 200                 "SwapFree:     %8lu kB\n"
 201                 "Dirty:        %8lu kB\n"
 202                 "Writeback:    %8lu kB\n"
 203                 "Mapped:       %8lu kB\n"
 204                 "Slab:         %8lu kB\n"
 205                 "Committed_AS: %8u kB\n"
 206                 "PageTables:   %8lu kB\n"
 207                 "VmallocTotal: %8lu kB\n"
 208                 "VmallocUsed:  %8lu kB\n"
 209                 "VmallocChunk: %8lu kB\n",
 210                 K(i.totalram),
 211                 K(i.freeram),
 212                 K(i.bufferram),
 213                 K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
 214                 K(total_swapcache_pages),
 215                 K(active),
 216                 K(inactive),
 217                 K(i.totalhigh),
 218                 K(i.freehigh),
 219                 K(i.totalram-i.totalhigh),
 220                 K(i.freeram-i.freehigh),
 221                 K(i.totalswap),
 222                 K(i.freeswap),
 223                 K(ps.nr_dirty),
 224                 K(ps.nr_writeback),
 225                 K(ps.nr_mapped),
 226                 K(ps.nr_slab),
 227                 K(committed),
 228                 K(ps.nr_page_table_pages),
 229                 vmtot,
 230                 vmi.used,
 231                 vmi.largest_chunk
 232                 );
 233
 234                 len += hugetlb_report_meminfo(page + len);
 235
 236         return proc_calc_metrics(page, start, off, count, eof, len);
 237 #undef K
 238 }
 239
 240 extern struct seq_operations fragmentation_op;
 241 static int fragmentation_open(struct inode *inode, struct file *file)
 242 {
 243         (void)inode;
 244         return seq_open(file, &fragmentation_op);
 245 }
 246
 247 static struct file_operations fragmentation_file_operations = {
 248         .open           = fragmentation_open,
 249         .read           = seq_read,
 250         .llseek         = seq_lseek,
 251         .release        = seq_release,
 252 };
 253
 254 static int version_read_proc(char *page, char **start, off_t off,
 255                                  int count, int *eof, void *data)
 256 {
 257         extern char *linux_banner;
 258         int len;
 259
 260         strcpy(page, linux_banner);
 261         len = strlen(page);
 262         return proc_calc_metrics(page, start, off, count, eof, len);
 263 }
 264
 265 extern struct seq_operations cpuinfo_op;
 266 static int cpuinfo_open(struct inode *inode, struct file *file)
 267 {
 268         return seq_open(file, &cpuinfo_op);
 269 }
 270 static struct file_operations proc_cpuinfo_operations = {
 271         .open           = cpuinfo_open,
 272         .read           = seq_read,
 273         .llseek         = seq_lseek,
 274         .release        = seq_release,
 275 };
 276
 277 extern struct seq_operations vmstat_op;
 278 static int vmstat_open(struct inode *inode, struct file *file)
 279 {
 280         return seq_open(file, &vmstat_op);
 281 }
 282 static struct file_operations proc_vmstat_file_operations = {
 283         .open           = vmstat_open,
 284         .read           = seq_read,
 285         .llseek         = seq_lseek,
 286         .release        = seq_release,
 287 };
 288
 289 #ifdef CONFIG_PROC_HARDWARE
 290 static int hardware_read_proc(char *page, char **start, off_t off,
 291                                  int count, int *eof, void *data)
 292 {
 293         int len = get_hardware_list(page);
 294         return proc_calc_metrics(page, start, off, count, eof, len);
 295 }
 296 #endif
 297
 298 #ifdef CONFIG_STRAM_PROC
 299 static int stram_read_proc(char *page, char **start, off_t off,
 300                                  int count, int *eof, void *data)
 301 {
 302         int len = get_stram_list(page);
 303         return proc_calc_metrics(page, start, off, count, eof, len);
 304 }
 305 #endif
 306
 307 extern struct seq_operations partitions_op;
 308 static int partitions_open(struct inode *inode, struct file *file)
 309 {
 310         return seq_open(file, &partitions_op);
 311 }
 312 static struct file_operations proc_partitions_operations = {
 313         .open           = partitions_open,
 314         .read           = seq_read,
 315         .llseek         = seq_lseek,
 316         .release        = seq_release,
 317 };
 318
 319 extern struct seq_operations diskstats_op;
 320 static int diskstats_open(struct inode *inode, struct file *file)
 321 {
 322         return seq_open(file, &diskstats_op);
 323 }
 324 static struct file_operations proc_diskstats_operations = {
 325         .open           = diskstats_open,
 326         .read           = seq_read,
 327         .llseek         = seq_lseek,
 328         .release        = seq_release,
 329 };
 330
 331 #ifdef CONFIG_MODULES
 332 extern struct seq_operations modules_op;
 333 static int modules_open(struct inode *inode, struct file *file)
 334 {
 335         return seq_open(file, &modules_op);
 336 }
 337 static struct file_operations proc_modules_operations = {
 338         .open           = modules_open,
 339         .read           = seq_read,
 340         .llseek         = seq_lseek,
 341         .release        = seq_release,
 342 };
 343 #endif
 344
 345 extern struct seq_operations slabinfo_op;
 346 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 347 static int slabinfo_open(struct inode *inode, struct file *file)
 348 {
 349         return seq_open(file, &slabinfo_op);
 350 }
 351 static struct file_operations proc_slabinfo_operations = {
 352         .open           = slabinfo_open,
 353         .read           = seq_read,
 354         .write          = slabinfo_write,
 355         .llseek         = seq_lseek,
 356         .release        = seq_release,
 357 };
 358
 359 int show_stat(struct seq_file *p, void *v)
 360 {
 361         int i;
 362         extern unsigned long total_forks;
 363         unsigned long jif;
 364         u64     sum = 0, user = 0, nice = 0, system = 0,
 365                 idle = 0, iowait = 0, irq = 0, softirq = 0;
 366
 367         jif = - wall_to_monotonic.tv_sec;
 368         if (wall_to_monotonic.tv_nsec)
 369                 --jif;
 370
 371         for_each_cpu(i) {
 372                 int j;
 373
 374                 user += kstat_cpu(i).cpustat.user;
 375                 nice += kstat_cpu(i).cpustat.nice;
 376                 system += kstat_cpu(i).cpustat.system;
 377                 idle += kstat_cpu(i).cpustat.idle;
 378                 iowait += kstat_cpu(i).cpustat.iowait;
 379                 irq += kstat_cpu(i).cpustat.irq;
 380                 softirq += kstat_cpu(i).cpustat.softirq;
 381                 for (j = 0 ; j < NR_IRQS ; j++)
 382                         sum += kstat_cpu(i).irqs[j];
 383         }
 384
 385         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu\n",
 386                 (unsigned long long)jiffies_64_to_clock_t(user),
 387                 (unsigned long long)jiffies_64_to_clock_t(nice),
 388                 (unsigned long long)jiffies_64_to_clock_t(system),
 389                 (unsigned long long)jiffies_64_to_clock_t(idle),
 390                 (unsigned long long)jiffies_64_to_clock_t(iowait),
 391                 (unsigned long long)jiffies_64_to_clock_t(irq),
 392                 (unsigned long long)jiffies_64_to_clock_t(softirq));
 393         for_each_cpu(i) {
 394
 395                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 396                 user = kstat_cpu(i).cpustat.user;
 397                 nice = kstat_cpu(i).cpustat.nice;
 398                 system = kstat_cpu(i).cpustat.system;
 399                 idle = kstat_cpu(i).cpustat.idle;
 400                 iowait = kstat_cpu(i).cpustat.iowait;
 401                 irq = kstat_cpu(i).cpustat.irq;
 402                 softirq = kstat_cpu(i).cpustat.softirq;
 403                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu\n",
 404                         i,
 405                         (unsigned long long)jiffies_64_to_clock_t(user),
 406                         (unsigned long long)jiffies_64_to_clock_t(nice),
 407                         (unsigned long long)jiffies_64_to_clock_t(system),
 408                         (unsigned long long)jiffies_64_to_clock_t(idle),
 409                         (unsigned long long)jiffies_64_to_clock_t(iowait),
 410                         (unsigned long long)jiffies_64_to_clock_t(irq),
 411                         (unsigned long long)jiffies_64_to_clock_t(softirq));
 412         }
 413         seq_printf(p, "intr %llu", (unsigned long long)sum);
 414
 415 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
 416         for (i = 0; i < NR_IRQS; i++)
 417                 seq_printf(p, " %u", kstat_irqs(i));
 418 #endif
 419
 420         seq_printf(p,
 421                 "\nctxt %llu\n"
 422                 "btime %lu\n"
 423                 "processes %lu\n"
 424                 "procs_running %lu\n"
 425                 "procs_blocked %lu\n",
 426                 nr_context_switches(),
 427                 (unsigned long)jif,
 428                 total_forks,
 429                 nr_running(),
 430                 nr_iowait());
 431
 432         return 0;
 433 }
 434
 435 static int stat_open(struct inode *inode, struct file *file)
 436 {
 437         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 438         char *buf;
 439         struct seq_file *m;
 440         int res;
 441
 442         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 443         if (size > 128 * 1024)
 444                 size = 128 * 1024;
 445         buf = kmalloc(size, GFP_KERNEL);
 446         if (!buf)
 447                 return -ENOMEM;
 448
 449         res = single_open(file, show_stat, NULL);
 450         if (!res) {
 451                 m = file->private_data;
 452                 m->buf = buf;
 453                 m->size = size;
 454         } else
 455                 kfree(buf);
 456         return res;
 457 }
 458 static struct file_operations proc_stat_operations = {
 459         .open           = stat_open,
 460         .read           = seq_read,
 461         .llseek         = seq_lseek,
 462         .release        = single_release,
 463 };
 464
 465 static int devices_read_proc(char *page, char **start, off_t off,
 466                                  int count, int *eof, void *data)
 467 {
 468         int len = get_chrdev_list(page);
 469         len += get_blkdev_list(page+len);
 470         return proc_calc_metrics(page, start, off, count, eof, len);
 471 }
 472
 473 /*
 474  * /proc/interrupts
 475  */
 476 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 477 {
 478         return (*pos <= NR_IRQS) ? pos : NULL;
 479 }
 480
 481 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 482 {
 483         (*pos)++;
 484         if (*pos > NR_IRQS)
 485                 return NULL;
 486         return pos;
 487 }
 488
 489 static void int_seq_stop(struct seq_file *f, void *v)
 490 {
 491         /* Nothing to do */
 492 }
 493
 494
 495 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 496 static struct seq_operations int_seq_ops = {
 497         .start = int_seq_start,
 498         .next  = int_seq_next,
 499         .stop  = int_seq_stop,
 500         .show  = show_interrupts
 501 };
 502
 503 int interrupts_open(struct inode *inode, struct file *filp)
 504 {
 505         return seq_open(filp, &int_seq_ops);
 506 }
 507
 508 static struct file_operations proc_interrupts_operations = {
 509         .open           = interrupts_open,
 510         .read           = seq_read,
 511         .llseek         = seq_lseek,
 512         .release        = seq_release,
 513 };
 514
 515 static int filesystems_read_proc(char *page, char **start, off_t off,
 516                                  int count, int *eof, void *data)
 517 {
 518         int len = get_filesystem_list(page);
 519         return proc_calc_metrics(page, start, off, count, eof, len);
 520 }
 521
 522 static int cmdline_read_proc(char *page, char **start, off_t off,
 523                                  int count, int *eof, void *data)
 524 {
 525         extern char saved_command_line[];
 526         int len;
 527
 528         len = sprintf(page, "%s\n", saved_command_line);
 529         return proc_calc_metrics(page, start, off, count, eof, len);
 530 }
 531
 532 #ifdef CONFIG_SGI_DS1286
 533 static int ds1286_read_proc(char *page, char **start, off_t off,
 534                                  int count, int *eof, void *data)
 535 {
 536         int len = get_ds1286_status(page);
 537         return proc_calc_metrics(page, start, off, count, eof, len);
 538 }
 539 #endif
 540
 541 static int locks_read_proc(char *page, char **start, off_t off,
 542                                  int count, int *eof, void *data)
 543 {
 544         int len = get_locks_status(page, start, off, count);
 545
 546         if (len < count)
 547                 *eof = 1;
 548         return len;
 549 }
 550
 551 static int execdomains_read_proc(char *page, char **start, off_t off,
 552                                  int count, int *eof, void *data)
 553 {
 554         int len = get_exec_domain_list(page);
 555         return proc_calc_metrics(page, start, off, count, eof, len);
 556 }
 557
 558 /*
 559  * This function accesses profiling information. The returned data is
 560  * binary: the sampling step and the actual contents of the profile
 561  * buffer. Use of the program readprofile is recommended in order to
 562  * get meaningful info out of these data.
 563  */
 564 static ssize_t
 565 read_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 566 {
 567         unsigned long p = *ppos;
 568         ssize_t read;
 569         char * pnt;
 570         unsigned int sample_step = 1 << prof_shift;
 571
 572         if (p >= (prof_len+1)*sizeof(unsigned int))
 573                 return 0;
 574         if (count > (prof_len+1)*sizeof(unsigned int) - p)
 575                 count = (prof_len+1)*sizeof(unsigned int) - p;
 576         read = 0;
 577
 578         while (p < sizeof(unsigned int) && count > 0) {
 579                 put_user(*((char *)(&sample_step)+p),buf);
 580                 buf++; p++; count--; read++;
 581         }
 582         pnt = (char *)prof_buffer + p - sizeof(unsigned int);
 583         if (copy_to_user(buf,(void *)pnt,count))
 584                 return -EFAULT;
 585         read += count;
 586         *ppos += read;
 587         return read;
 588 }
 589
 590 /*
 591  * Writing to /proc/profile resets the counters
 592  *
 593  * Writing a 'profiling multiplier' value into it also re-sets the profiling
 594  * interrupt frequency, on architectures that support this.
 595  */
 596 static ssize_t write_profile(struct file *file, const char __user *buf,
 597                              size_t count, loff_t *ppos)
 598 {
 599 #ifdef CONFIG_SMP
 600         extern int setup_profiling_timer (unsigned int multiplier);
 601
 602         if (count == sizeof(int)) {
 603                 unsigned int multiplier;
 604
 605                 if (copy_from_user(&multiplier, buf, sizeof(int)))
 606                         return -EFAULT;
 607
 608                 if (setup_profiling_timer(multiplier))
 609                         return -EINVAL;
 610         }
 611 #endif
 612
 613         memset(prof_buffer, 0, prof_len * sizeof(*prof_buffer));
 614         return count;
 615 }
 616
 617 static struct file_operations proc_profile_operations = {
 618         .read           = read_profile,
 619         .write          = write_profile,
 620 };
 621
 622 #ifdef CONFIG_MAGIC_SYSRQ
 623 /*
 624  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 625  */
 626 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 627                                    size_t count, loff_t *ppos)
 628 {
 629         if (count) {
 630                 char c;
 631
 632                 if (get_user(c, buf))
 633                         return -EFAULT;
 634                 handle_sysrq(c, NULL, NULL);
 635         }
 636         return count;
 637 }
 638
 639 static struct file_operations proc_sysrq_trigger_operations = {
 640         .write          = write_sysrq_trigger,
 641 };
 642 #endif
 643
 644 struct proc_dir_entry *proc_root_kcore;
 645
 646 static void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
 647 {
 648         struct proc_dir_entry *entry;
 649         entry = create_proc_entry(name, mode, NULL);
 650         if (entry)
 651                 entry->proc_fops = f;
 652 }
 653
 654 void __init proc_misc_init(void)
 655 {
 656         struct proc_dir_entry *entry;
 657         static struct {
 658                 char *name;
 659                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 660         } *p, simple_ones[] = {
 661                 {"loadavg",     loadavg_read_proc},
 662                 {"uptime",      uptime_read_proc},
 663                 {"meminfo",     meminfo_read_proc},
 664                 {"version",     version_read_proc},
 665 #ifdef CONFIG_PROC_HARDWARE
 666                 {"hardware",    hardware_read_proc},
 667 #endif
 668 #ifdef CONFIG_STRAM_PROC
 669                 {"stram",       stram_read_proc},
 670 #endif
 671                 {"devices",     devices_read_proc},
 672                 {"filesystems", filesystems_read_proc},
 673                 {"cmdline",     cmdline_read_proc},
 674 #ifdef CONFIG_SGI_DS1286
 675                 {"rtc",         ds1286_read_proc},
 676 #endif
 677                 {"locks",       locks_read_proc},
 678                 {"execdomains", execdomains_read_proc},
 679                 {NULL,}
 680         };
 681         for (p = simple_ones; p->name; p++)
 682                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 683
 684         proc_symlink("mounts", NULL, "self/mounts");
 685
 686         /* And now for trickier ones */
 687         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 688         if (entry)
 689                 entry->proc_fops = &proc_kmsg_operations;
 690         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 691         create_seq_entry("partitions", 0, &proc_partitions_operations);
 692         create_seq_entry("stat", 0, &proc_stat_operations);
 693         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 694         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 695         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 696         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 697         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 698 #ifdef CONFIG_MODULES
 699         create_seq_entry("modules", 0, &proc_modules_operations);
 700 #endif
 701 #ifdef CONFIG_PROC_KCORE
 702         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 703         if (proc_root_kcore) {
 704                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 705                 proc_root_kcore->size =
 706                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 707         }
 708 #endif
 709         if (prof_on) {
 710                 entry = create_proc_entry("profile", S_IWUSR | S_IRUGO, NULL);
 711                 if (entry) {
 712                         entry->proc_fops = &proc_profile_operations;
 713                         entry->size = (1+prof_len) * sizeof(unsigned int);
 714                 }
 715         }
 716 #ifdef CONFIG_MAGIC_SYSRQ
 717         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 718         if (entry)
 719                 entry->proc_fops = &proc_sysrq_trigger_operations;
 720 #endif
 721 #ifdef CONFIG_PPC32
 722         {
 723                 extern struct file_operations ppc_htab_operations;
 724                 entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
 725                 if (entry)
 726                         entry->proc_fops = &ppc_htab_operations;
 727         }
 728 #endif
 729 }